Water-based spraying, repackaging and printing ink and preparation method thereof
By using unsaturated double bond resin liquid and magnesium oxide talc powder and other ingredients in water-based lamination packaging printing ink, the problems of insufficient adhesion and high energy consumption are solved, and efficient and low-cost water-based lamination packaging printing effect is achieved.
Patent Information
- Application Number
- CN202510910859.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-02
- Publication Date
- 2025-09-16
AI Technical Summary
Existing water-based lamination packaging printing inks have problems such as insufficient adhesion on non-absorbent plastic substrates, high softening point leading to increased energy consumption, and high costs, making it difficult to replace traditional benzene-based inks.
The water-based lamination packaging printing ink containing unsaturated double or triple bonds, emulsified modified polymers and magnesium oxide talc powder is used to improve the adhesion, reduce the softening point and control costs through drying and cross-linking.
It achieves a lasting improvement in adhesion on non-absorbent plastic substrates, and the peeling force reaches the level of traditional benzene inks, reducing energy consumption and costs and extending service life.
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Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of water-based sprinkling packaging printing, and particularly relates to a water-based sprinkling packaging printing ink and a preparation method thereof. Background Art
[0002] To reduce carbon emissions and improve environmental quality, China has strictly banned the use of benzene-based packaging printing inks and has repeatedly established VOC technical standards. Especially since the 2015 Paris Agreement, both Chinese and international industries have developed ester- and alcohol-based non-absorbent printing inks and inkjet inks (including, in recent years, alcohol-ester inks, which have been partially applied to plastic packaging). Suitable for non-woven fabrics coated with alcohol-water-based inks (70% alcohol, 30% water dilution), these inks exhibit peel strengths (N) ranging from 1.8 to 2.5N. While approaching the peel strength of alcohol-ester inks, they still fall short of the 5N standard for traditional benzene-based inks. Furthermore, once the neutralizer in alcohol-water-based ink systems oxidizes, the lamination layer will begin to degrade to varying degrees after as little as two months and as long as six months (now known as "attenuation"). A water-based lamination ink that is being tested on the market only emphasizes quick drying while ignoring the softening point of the ink. The lamination temperature needs to be between 120 and 140°C, which is 15 to 30°C higher than the temperature of traditional lamination inks at home and abroad. It is very easy to cause shrinkage and deformation of the ink film of plastic printing graphics, and the company will also consume nearly one-third more electricity. In particular, in order to achieve long-lasting adhesion, the ink must be changed from traditional cheap organic pigments (average price 40 to 60 yuan / kg) to solvent-based pigments (dyes) with a price of up to 100 to 400 yuan / kg to facilitate lamination penetration, which invisibly pushes the cost of the ink to about 30 yuan per kilogram, almost 85% of the price of traditional benzene-based inks. It is often rejected by packaging and printing companies and is not profitable.
[0003] Therefore, the industry needs to develop a water-based packaging printing ink for sprinkling and spraying on non-absorbent plastic (including metal materials) substrates that not only has initial adhesion but also has longer-lasting adhesion, to fill the gap between the benzene-based and ester-based inks that have been eliminated and pollute the environment. Summary of the Invention
[0004] The purpose of the present invention is to provide a water-based lamination packaging printing ink and a preparation method to solve the problem of the long-lasting adhesion of the existing lamination ink, and to achieve long-lasting adhesion and quick drying efficiency of printing by relying on high softening point ink to avoid increased energy consumption and cost, and to improve the peel force (N) value.
[0005] The technical solution of the ink of the present invention is: a water-based lamination packaging printing ink, which is characterized by being composed of the following components in parts by weight: 3 to 9 parts of resin liquid containing unsaturated double bonds or triple bonds; 5-45 parts of emulsified modified polypropylene; 5-15 parts of emulsified modified polyethylene; 8-22 parts of emulsified modified polyester; 0.2-12 parts of emulsified modified polyurethane; 6-10 parts of emulsified modified butene; 20-36 parts of water-based color paste; 0.5-35 parts of methyl ether; 0.4-1.3 parts of ink neutralizer; 2.3-7.3 parts of ethanol; 0.18-0.55 parts of triethanolamine; The proportion of the resin liquid with unsaturated double bonds or triple bonds is the same as the sum of the proportions of ethanol, hydrogen-rich water and triethanolamine.
[0006] The resin containing unsaturated double bonds or triple bonds in the technical solution of the ink of the present invention contains 0.5 to 10.00 unsaturated double bonds or triple bonds in the resin liquid: solid content 48.6% / PH value 8.24 / particle size 1.158 microns.
[0007] The water-based color paste in the technical solution of the water-based ink of the present invention contains 10-28% talc powder, 30-69% pigment and 3-9% dispersing viscosity-reducing penetrant. The talc powder contains 20-36% magnesium oxide, and the magnesium oxide serves as an inorganic drying catalyst and cross-linking enhancer for coloring the ink film of the water-based ink printing image.
[0008] The emulsified modified polyethylene in the technical solution of the ink of the present invention is an emulsified polyethylene modified resin liquid with a solid content of 60% / a pH value of 8.32 / a particle size of 0.810 microns.
[0009] The emulsified modified polypropylene in the technical solution of the ink of the present invention is an emulsified modified polypropylene resin liquid with a solid content of 48.3% / a pH value of 7.88 / a particle size of 1.019 microns.
[0010] The emulsified modified polyester in the technical solution of the ink of the present invention is an emulsified polyester resin liquid with a solid content of 64% / a pH value of 7.83 / a particle size of 0.921 microns.
[0011] The emulsified modified polyurethane in the technical solution of the ink of the present invention is an emulsified polyurethane resin liquid with a solid content of 35.5% / a pH value of 8.51 / a particle size of 0.666 microns.
[0012] The chemically modified butene in the technical solution of the ink of the present invention is an emulsified butene resin liquid with a solid content of 38% / a pH value of 8.34 / a particle size of 0.358 microns.
[0013] The methyl ether in the technical solution of the ink of the present invention is dipropylene glycol methyl ether.
[0014] The technical solution of the ink of the present invention is composed of the following components in parts by weight: 5 parts of resin liquid containing unsaturated double bonds or triple bonds; 25 parts of emulsified modified polypropylene; 10 parts of emulsified modified polyethylene; 15 parts of emulsified modified polyester; 12 parts of emulsified modified polyurethane; 8 parts of emulsified modified butene; 28 parts of talc water-based color paste containing magnesium oxide; 2 parts of dipropylene glycol methyl ether; 0.7 parts of ink neutralizer; 4 parts of ethanol; 0.3 parts of triethanolamine.
[0015] The ink neutralizer in the technical solution of the ink of the present invention adopts alkaline hydrogen-rich water as the main neutralizer, with hydrogen-rich water accounting for 2-8%; the resin liquid with unsaturated double bonds or triple bonds accounts for 50%, ethanol accounts for 40%, the ink neutralizer accounts for 7%, and triethanolamine accounts for 3%.
[0016] The technical solution of the preparation method of the present invention is: a method for preparing water-based lamination packaging printing ink, which is characterized by comprising the following steps: (1) Putting 50% of a resin liquid containing unsaturated double bonds or triple bonds into a reactor, stirring and dissolving it with 40% of ethanol, 7% of an ink neutralizer, and 3% of triethanolamine for 40 minutes, and filtering to obtain a resin liquid mixture, wherein hydrogen-rich water in the ink neutralizer accounts for 2-8%; (2) The water-based color paste contains 10-28% talc powder, 30-69% pigment and 3-9% dispersing viscosity-reducing penetrant. Put the talc powder and pigment into the dispersion barrel, add the dispersing viscosity-reducing penetrant and stir for 10 minutes, then transfer to a three-dimensional bead mill or an ultra-low temperature, ultra-high pressure laser machine and grind for 40 minutes at an internal temperature of 6-26°C, and filter to obtain a 5-15 micron water-based color paste; (3) mixing the resin liquid mixture and the aqueous color paste, stirring for 3 to 5 minutes, and then filtering to obtain the aqueous color paste mixture; (4) Finally, emulsified modified polypropylene, emulsified modified polyethylene, emulsified modified polyester, emulsified modified polyurethane, emulsified modified butylene and methyl ether are added in sequence under dispersing and stirring in a disperser, and the dispersion is continued for 3 to 5 minutes to obtain a water-based saliva-spraying packaging printing ink.
[0017] The technical solution of the preparation method of the present invention comprises the following components: 5 parts of resin liquid containing unsaturated double bonds or triple bonds; 25 parts of emulsified modified polypropylene; 10 parts of emulsified modified polyethylene; 15 parts of emulsified modified polyester; 12 parts of emulsified modified polyurethane; 8 parts of emulsified modified butene; 28 parts of talc water-based color paste containing magnesium oxide; 2 parts of dipropylene glycol methyl ether; 0.7 parts of ink neutralizer; 4 parts of ethanol; 0.3 parts of triethanolamine.
[0018] The pH value of the aqueous saliva-spraying packaging printing ink in the technical solution of the invention preparation method is controlled between 7.6 and 8.2.
[0019] The water-based extrusion-laminated (also known as extrusion-laminated) packaging printing ink prepared using the above method uses commonly available pigments and a talc-based colorant containing magnesium oxide (which acts as a drying and cross-linking agent) as a pigment-enhancing water-based color paste. The drying and cross-linking effects of the magnesium oxide increase the drying speed of unsaturated double and triple bonds in the system, enhancing the long-term adhesive strength after extrusion lamination—raising peel strength and extending the product packaging's shelf life by two years.
[0020] The present invention has the beneficial effects of providing a water-based lamination and drooling compound, often called extrusion lamination or coating lamination (abbreviated as lamination), packaging printing ink and its preparation method. The ink is used on non-absorbent substrates such as plastic woven bags and non-woven fabrics (except for the pressure of the printer caused by corona treatment of the plastic surface, the intermolecular forces after molecular bridging have a relatively long-lasting adhesive force). It can basically reach the peeling force (N) value of obsolete benzene-based inks. The printing speed is moderate, the cost is low, and the overprinting is good. Especially in winter, when the oxygen level drops, the lamination and drooling compound can still be normally performed at a controlled temperature of 95 to 110°C, and the ink has the advantage of a long life from production, storage and transportation, and from printed products to commodity packaging and consumption.
[0021] The invention is mainly used for water-based lamination packaging printing ink for absorbent or non-absorbent substrates, replacing benzene-soluble ink and alcohol ester ink. DETAILED DESCRIPTION
[0022] Example 1 A water-based lamination packaging printing ink, comprising the following components in parts by weight: 5 parts of resin liquid with unsaturated double or triple bonds; 10 parts of emulsified modified polyethylene; 8 parts of emulsified modified butene; 15 parts of emulsified modified polyester; 12 parts of emulsified modified polyurethane; 25 parts of emulsified modified polypropylene; 28 parts of talc water-based color paste containing magnesium oxide; 2 parts of dipropylene glycol methyl ether; 0.7 parts of ink neutralizer; 4 parts of ethanol; 0.3 parts of triethanolamine; The resin liquid containing unsaturated double bonds or triple bonds contains 0.05 to 10.00% of unsaturated resin with double or triple bonds, a solid content of 48.6%, a pH value of 8.24, and a particle size of 1.158 microns.
[0023] Among them, the system of talc water-based color paste containing magnesium oxide contains 10-28% talc, 30-69% pigment and 3-9% dispersing viscosity reducing penetrant. The talc contains 20-36% magnesium oxide as the inorganic drying catalyst and cross-linking enhancer for the ink film coloring of the water-based ink printing graphic.
[0024] The preparation steps include: (1) 5 parts of a resin liquid containing unsaturated double bonds or triple bonds were put into a reactor, stirred and dissolved with 4 parts of ethanol, 0.7 parts of a water-based ink neutralizer, and 0.3 parts of triethanolamine for 40 minutes, and filtered to obtain a resin liquid mixture, wherein the water-based ink neutralizer is mainly alkaline hydrogen-rich water, and the hydrogen-rich water accounts for 2-8%; (2) The water-based color paste contains 10-28% talc powder, 30-69% pigment and 3-9% dispersing viscosity reducing penetrant. 11 parts of talc powder and 14 parts of pigment are put into a dispersion barrel, 3 parts of dispersing viscosity reducing penetrant are added and stirred for 10 minutes, and then transferred to a three-dimensional bead mill for grinding at an internal temperature of 6-26°C for 40 minutes, and filtered to obtain a 5-15 micron water-based color paste, or transferred to a two-dimensional ultra-low temperature, ultra-high pressure laser machine for grinding at an internal temperature of 6-26°C for 40 minutes, and filtered to obtain a 5-15 micron water-based color paste; (3) mixing the resin liquid mixture and the aqueous color paste, stirring for 3 to 5 minutes, and then filtering to obtain the aqueous color paste mixture; (4) Finally, 25 parts of emulsified modified polypropylene, 10 parts of emulsified modified polyethylene, 15 parts of emulsified modified polyester, 12 parts of emulsified modified polyurethane, 8 parts of emulsified modified butylene and 2 parts of dipropylene glycol methyl ether were added in sequence under dispersing and stirring in a disperser, and the dispersion was continued for 3 to 5 minutes to obtain a water-based saliva-spraying packaging printing ink.
[0025] The water-based lamination packaging printing ink prepared using the above-mentioned components and preparation method uses commonly available organic pigments and talc containing magnesium oxide as a coloring and reinforcing agent, resulting in a water-based color paste. The drying and cross-linking effects of the magnesium oxide not only increase the strength of the double- and triple-bond resin liquid, but also accelerate the drying rate through intermolecular forces after molecular cross-linking, enhancing the long-lasting bond strength (peel force (N)) after lamination, thereby extending the shelf life of product packaging by one to two years. This method is often referred to as the "two-step ink production method."
[0026] The effects of time / temperature, humidity, absorbent substrates, and pH value on the drying of ink are shown in Table 1.
[0027] Schedule 1 The viscosity technical parameters of the prepared water-based lamination packaging printing ink were compared and tested, and the results are shown in Appendix 2.
[0028] Schedule 2 Note: Diluent formulas for different solubilities: ① Water 90 + Ethanol 10 = 100%; ② Water 80 + Ethanol 15 + Dimethyl Carbonate 5 = 100%; ③ Water 70 + Isopropyl Alcohol 5 + Butanol 5 + Ethyl Acetate 20 = 100%.
[0029] The peeling force (N) values of the water-based resins approved for use in the market (using the same 70% + 30% color paste ratio of the lamination packaging printing ink) were tested by a third party on November 25, 2024 after lamination. The results are shown in Appendix 3.
[0030] Schedule 3 The above-mentioned water-based resins were screened and used to produce water-based lamination inks under the same conditions. This was done after the beginning of winter, when oxygen levels dropped. The results showed that the initial adhesion and, in particular, the long-term adhesion of the resin solution, after adding emulsified modified polypropylene, were superior to those of other commercially available water-based resins. The water-based lamination inks used in this invention for packaging printing (on non-absorbent plastic film substrates) exhibited superior long-term adhesion compared to other inks with the same formulation and production method.
[0031] The above implementation cases of the present invention provide a water-based lamination packaging printing ink and a preparation method, as well as the peeling values of 500g weight at 90° and 180° tearing angles respectively, which are introduced in detail by a third party. This article uses specific examples to illustrate the basic principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the bottom line of the research and application concept of the method of the present invention and its core environmental protection value, and to build consensus on the core technology focus. At the same time, for general engineering and technical personnel in this field, based on the basic scientific knowledge and technical parameters of the present invention, there will be changes and innovations in the details of the specific implementation method and the scope of application to enhance the added value of water-based lamination ink products.
[0032] In summary, the contents of this patent specification should not be understood as limiting the patent of this invention.
Claims
1. A water-based lamination packaging printing ink, characterized by It is composed of the following ingredients in parts by weight: 3 to 9 parts of resin liquid containing unsaturated double bonds or triple bonds; 5-45 parts of emulsified modified polypropylene; 5-15 parts of emulsified modified polyethylene; 8-22 parts of emulsified modified polyester; 0.2-12 parts of emulsified modified polyurethane; 6-10 parts of emulsified modified butene; 20-36 parts of water-based color paste; 0.5-35 parts of methyl ether; 0.4-1.3 parts of ink neutralizer; 2.3-7.3 parts of ethanol; 0.18-0.55 parts of triethanolamine; The proportion of the resin liquid with unsaturated double bonds or triple bonds is the same as the sum of the proportions of ethanol, hydrogen-rich water and triethanolamine.
2. The water-based lamination packaging printing ink according to claim 1, characterized in that: The resin liquid containing unsaturated double bonds or triple bonds contains 0.5 to 10.00% of unsaturated double bonds or triple bonds: solid content 48.6% / PH value 8.24 / particle size 1.158 microns.
3. The water-based lamination packaging printing ink according to claim 1, characterized in that: The water-based color paste contains 10-28% talc powder, 30-69% pigment and 3-9% dispersing viscosity reducing penetrant. The talc powder contains 20-36% magnesium oxide, which serves as an inorganic drying catalyst and cross-linking enhancer for the ink film coloring of the water-based ink printing graphic.
4. The water-based lamination packaging printing ink according to claim 1, characterized in that: The emulsified modified polyethylene is an emulsified polyethylene modified resin liquid with a solid content of 60% / a pH value of 8.32 / a particle size of 0.810 microns; the emulsified modified polypropylene is an emulsified modified polypropylene resin liquid with a solid content of 48.3% / a pH value of 7.88 / a particle size of 1.019 microns; the emulsified modified polyester is an emulsified polyester resin liquid with a solid content of 64% / a pH value of 7.83 / a particle size of 0.921 microns; the emulsified modified polyurethane is an emulsified polyurethane resin liquid with a solid content of 35.5% / a pH value of 8.51 / a particle size of 0.666 microns; and the emulsified modified butene is an emulsified butene resin liquid with a solid content of 38% / a pH value of 8.34 / a particle size of 0.358 microns.
5. The water-based lamination packaging printing ink according to claim 1, characterized in that: The methyl ether is dipropylene glycol methyl ether.
6. The water-based lamination packaging printing ink according to claim 1, characterized in that It is composed of the following ingredients in parts by weight: 5 parts of resin liquid containing unsaturated double bonds or triple bonds; 25 parts of emulsified modified polypropylene; 10 parts of emulsified modified polyethylene; 15 parts of emulsified modified polyester; 12 parts of emulsified modified polyurethane; 8 parts of emulsified modified butene; 28 parts of talc water-based color paste containing magnesium oxide; 2 parts of dipropylene glycol methyl ether; 0.7 parts of ink neutralizer; 4 parts of ethanol; 0.3 parts of triethanolamine.
7. The water-based lamination packaging printing ink according to claim 1, characterized in that: The ink neutralizer adopts alkaline hydrogen-rich water as the main neutralizer, with hydrogen-rich water accounting for 2-8%; the unsaturated double bond or triple bond resin liquid accounts for 50%, ethanol accounts for 40%, the ink neutralizer accounts for 7%, and triethanolamine accounts for 3%.
8. A method for preparing the water-based lamination packaging printing ink according to claim 1, characterized in that: The following steps are involved: (1) putting 50% of a resin liquid containing unsaturated double bonds or triple bonds into a reactor, adding 40% of ethanol, 7% of an ink neutralizer, and 3% of triethanolamine, stirring and dissolving for 40 minutes, and filtering to obtain a resin liquid mixture, wherein hydrogen-rich water in the ink neutralizer accounts for 2-8%; (2) The water-based color paste contains 10-28% talc powder, 30-69% pigment and 3-9% dispersing viscosity-reducing penetrant. The talc powder and pigment are put into a dispersion barrel, and the dispersing viscosity-reducing penetrant is added and stirred for 10 minutes. Then, the mixture is transferred to a three-dimensional bead mill with ultra-low temperature and ultra-high pressure laser machine and ground for 40 minutes under the temperature control of 6-26°C. After that, the mixture is filtered to obtain a 5-15 micron water-based color paste. (3) mixing the resin liquid mixture and the aqueous color paste, stirring for 3 to 5 minutes, and then filtering to obtain an aqueous color paste mixture; (4) Finally, emulsified modified polypropylene, emulsified modified polyethylene, emulsified modified polyester, emulsified modified polyurethane, emulsified modified butylene and methyl ether are added in sequence under dispersion and stirring in a disperser, and the dispersion is continued for 3 to 5 minutes to obtain a water-based saliva-spraying packaging printing ink.
9. The method for preparing water-based lamination packaging printing ink according to claim 8, characterized in that: The ingredients include: 5 parts of resin liquid containing unsaturated double bonds or triple bonds; 25 parts of emulsified modified polypropylene; 10 parts of emulsified modified polyethylene; 15 parts of emulsified modified polyester; 12 parts of emulsified modified polyurethane; 8 parts of emulsified modified butene; 28 parts of talc water-based color paste containing magnesium oxide; 2 parts of dipropylene glycol methyl ether; 0.7 parts of ink neutralizer; 4 parts of ethanol; 0.3 parts of triethanolamine.
10. The method for preparing water-based lamination packaging printing ink according to claim 8 or 9, characterized in that: The pH value of the water-based saliva-spraying packaging printing ink is controlled between 7.6 and 8.2.